/Engine/Source/Runtime/Engine/Classes/Animation/AnimData/IAnimationDataController.h
Duplicated the attribute (curve) with the identifier. Broadcasts a EAnimDataModelNotifyType::AttributeAdded notify if successful.
Whether or not the attribute was successfully duplicated
bool DuplicateAttribute ( const [FAnimationAttributeIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationAttributeIdentifier) & AttributeIdentifier, const [FAnimationAttributeIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationAttributeIdentifier) & NewAttributeIdentifier, bool bShouldTransact )